Mitochondrial lipoylated protein (null)

Mitochondrial lipoylated proteins are a small, evolutionarily conserved group of mitochondrial metabolic enzyme complexes that undergo lipoylation—a post-translational modification where the cofactor lipoic acid is covalently attached to specific lysine residues[1][3]. This modification is essential for the activity of key mitochondrial enzyme complexes such as pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, branched-chain alpha-ketoacid dehydrogenase, and the glycine cleavage system. Lipoylation facilitates proper enzymatic function in oxidative metabolism and is critical for coupling glycolysis to the TCA cycle and amino acid catabolism. Dysregulation or loss of protein lipoylation causes severe metabolic deficits and is implicated in a range of disorders including metabolic disease, cancer, neurodegeneration, and newly characterized forms of regulated cell death like cuproptosis—where excessive copper induces toxic aggregation of these proteins[1][2][3]. New research highlights their potential as therapeutic targets for modulating mitochondrial metabolism and treating metabolic or proliferative diseases.

Other names

Lipoylated mitochondrial proteinsLipoylated enzyme complexesMitochondrial protein lipoylation

Induction of protein aggregation and cell death through copper-ion binding to lipoylated proteins (cuproptosis) Modulation of metabolic flux by altering lipoylation state (potential future approaches) Enzyme activity regulation by inhibiting or depleting lipoylation